house i'm not sure they he will. >> chris: senator john mccain who has been pushing president obama to intervene in syria for two years renewing his call this week after finding the assad regime has used chemical weapons. it is time for the sunday group. brit hume, fox news senior political analyst. amy walter of the cook political report. bill kristol from the weekly standard and charles lane of the washington post. i think it is fair to say that president obama has put himself in a bit of a box here on syria. kept talking for months about red lines and consequences and game changers but you clearly mindful of the bad entell against that led into the invasion of iraq and also clear he never wanted to get involved military in syria. is there a graceful way out for him? >> what he will do and is trying to do is insist on ironclad proof. you wonder if he doesn't want an affidavit signed by bashar assad himself saying yes indeed we did use serin gas on these people. appetizing prospect. a president who didn't want to intervene to stop the deaths of what is now 70,000 people i don't thi